Mitsubishi GX Series 12,000 BTU Mini Split Heat Pump

Name: Mitsubishi GX Series 12,000 BTU Mini Split Heat Pump
Brand: Mitsubishi
Price: 2538.0 USD
Availability: InStock

SKU: mi17760k | Model: MUZ-GX12NL/MSZ-GX12NL

$2,538.00 $2,699.00

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Manufacturer's Warranty

10-Year Warranty (With Registration and Professional Installation)

What's In The Box?

Mitsubishi 12,000 BTU GX Series Mini Split Heat Pump Indoor Air Handler MUZ-GX12NL
Mitsubishi 12,000 BTU GX Series Mini Split Heat Pump Outdoor Condenser MSZ-GX12NL
Installation Hardware
Owner's Manual, Guides, and Other Documents

Info & Guides

Engineered for precise climate control, the Mitsubishi 12,000 BTU GX Series Mini-Split Heat Pump provides dependable heating and cooling for single zones up to 550 square feet without the added ductwork. This wall-mounted system pairs inverter-driven technology with advanced electronics to keep your space comfortable all year long.

Whether you're finishing a bonus room or modernizing a small office, the GX Series delivers balanced temperatures and quiet operation while integrating smoothly with today’s connected homes.

Key Features and Benefits of the Mitsubishi 12,000 BTU GX Series Mini-Split Heat Pump

High Efficiency: This system is Energy Star-rated, with a 25.6 SEER2 rating for cooling and HSPF2 10.7 rating for heating, which cuts energy use so you can manage operating expenses without sacrificing comfort.
All-Season Capacity: Provides 12,000 BTUs of cooling and 14,400 BTUs of heating to serve single-zone spaces.
Low-Ambient Heating: This model's indoor air handler keeps delivering warmth when outdoor temperatures drop to -4 degrees F, making it dependable for colder climates and shoulder seasons.
Inverter Compressor: Adjusts speed in real time for steady room temperatures and fewer on-off cycles, reducing wear and noise.
Built-In Wi-Fi Control: Connects to Mitsubishi’s Comfort app so you can change settings, view status, and set schedules from anywhere.
R-454B Refrigerant: Next-generation refrigerant offers a lower global warming potential compared with legacy blends, aligning with evolving sustainability goals.
Econo Cool Mode: Optimizes airflow patterns to maintain comfort while lowering energy demand during mild conditions.
Powerful Mode: Runs the compressor and fan at maximum output for a short burst, quickly reaching target temperatures when it's needed most.
Dual Barrier Coating: Limits dust and oil buildup on internal surfaces, helping the system maintain peak performance and extending service intervals.
Blue Fin Condenser: Anti-rust treatment on the outdoor coil enhances durability in coastal or corrosive environments, supporting a longer service life.
Quiet Operation: Indoor sound levels as low as 19 dB let you work or relax without intrusive background noise.

Note: This model requires professional installation and does not include the 1/4 x 3/8" line set needed for installation.

Low-Temp Reliability

Many heat pumps struggle as outdoor temperatures approach freezing, but this GX Series model is engineered to maintain output when the mercury drops. Its outdoor compressor unit and control board are optimized for cold-weather operation, so you can rely on steady heat at -4 degrees F without supplemental resistance elements. That performance protects pipes, finishes, and occupants in garages, workshops, and guest suites during winter’s worst while avoiding the jump in energy consumption typical of backup heaters.

Sylvane’s Expert Take

If you need year-round conditioning for a single zone, this Mitsubishi mini-split stands out for efficiency, low-ambient cooling capability, and integrated smart control. The inverter compressor keeps energy use in check, and the R-454B refrigerant has a lower global warming impact than other legacy blends. Clean-air filtration and a durable coating reduce upkeep, making it a solid long-term investment for both residential upgrades and light commercial spaces.